Rated 5 out of 5 stars

This sidebar is, in a number of ways, superior to the to "Net" functionality in FireBug. It is more stable than Firebug, it displays absolutely everything that appears in the sent and received HTTP headers, and the "Save All" feature is extremely useful. This add-on has helped me solve dozens of very tricky Web site issues. It is one of the first things I add to every new Firefox install.

This review is for a previous version of the add-on (0.15).